This dissertation mainly researches the hybridity theory of Homi Bhabha, and with this theory as the ground, the dissertation discusses the development and significance of the postmodernist version of identity with Bhabha’s hybridity theory as its representative in the contemporary ear.

Identification of physiological races and AFLP analysis in F_1 generation of sexual hybridization between isolates of Setosphaeria turcica;

Study of the sexual hybridization method for transgenic carrot with two target genes;

Yun sweet-smelling is a new variety of pear developed by sexual hybridization, sowing and primary selection, res-election, final selection in 1976, the regional test was taken at elevation 1 820-2 200 m in Yunnan province, 1995-1989.

Nipponbare by the way of sexual hybrid for the first time,the integration and transcribe of glucose oxidase gene was confirmed by RT-PCR analysis on shuhui 162 rice genome,it proved the GO gene can be transfered between Indica and japonica.

It is manifested that:the mother Gaxtrodia elata s different quality have obvious influence to Sexual hybridization situation which influence yield rate the difference is obvious.

Crossability of Common Wheat Line 86-741 with Rye;

Inheritance of Crossability of Triticum turgidum cv Jianyangailanmai with Rye and Its Expression in Hexaploid Wheat Background;

102 CIMMYT synthetic hexaploid wheats(SHWs) were employed to cross with rye for evaluating the crossability of SHWs and screening SHWs with high crossability for distant cross.